Dave said he uses an eraser to get into the grooves of the commutator. His thoughts are, motor spray leaves a film, that the brushed pick up and will affect power to the comm. so, spraying a motor would mean another water break in for a few minutes. Make sure you are watching Monday night. Jim and Barry will be there and that is a perfect question to bring up. I’m working on trying to find a better method of video and audio for that show, since it will have a lot of technical details
